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          <h1 class="post-title" itemprop="name headline">微信小程序 自定义模态框

              
            
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            <div class="post-description">微信小程序官方提供的模态框没有适合自己的需求的？？？怎么办？？？没事，自己动手写一个吧~</div>
          

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        <h1 id="为什么要自定义模态框？"><a href="#为什么要自定义模态框？" class="headerlink" title="为什么要自定义模态框？"></a>为什么要自定义模态框？</h1><p>因为官方提供的模态框缺乏灵活性，无法满足每个人的需求，所以我们可以根据自己的实际需求来实现自定义模态框。</p>
<h1 id="效果图"><a href="#效果图" class="headerlink" title="效果图"></a>效果图</h1><p><img src="http://zwd.yyzheng.cn/wechat_model/20190423145403281.gif" alt="在这里插入图片描述"></p>
<h1 id="实现思路"><a href="#实现思路" class="headerlink" title="实现思路"></a>实现思路</h1><p>通过一个蒙层+自定义的弹窗来实现上图的效果，而弹窗的消失与出现则通过一个状态值来控制即可。</p>
<h1 id="界面代码"><a href="#界面代码" class="headerlink" title="界面代码"></a>界面代码</h1><p>index.wxml</p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">&lt;!-- 请在需要触发弹窗的地方添加以下函数，可以是按钮或者文本框 --&gt;</span></span><br><span class="line">bindtap="showDialogBtn"</span><br><span class="line"></span><br><span class="line"><span class="comment">&lt;!-- 自定义弹窗 --&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">view</span> <span class="attr">class</span>=<span class="string">"modal-mask"</span> <span class="attr">bindtap</span>=<span class="string">"hideModal"</span> <span class="attr">catchtouchmove</span>=<span class="string">"true"</span> <span class="attr">wx:if</span>=<span class="string">"&#123;&#123;showModal&#125;&#125;"</span>&gt;</span><span class="tag">&lt;/<span class="name">view</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">view</span> <span class="attr">class</span>=<span class="string">"modal-dialog"</span> <span class="attr">wx:if</span>=<span class="string">"&#123;&#123;showModal&#125;&#125;"</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">view</span> <span class="attr">class</span>=<span class="string">"modal-title"</span>&gt;</span>修改求职意向<span class="tag">&lt;/<span class="name">view</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">view</span> <span class="attr">class</span>=<span class="string">"modal-content"</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">view</span> <span class="attr">class</span>=<span class="string">"modal-input"</span>&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">input</span> <span class="attr">placeholder-class</span>=<span class="string">"input-holder"</span> <span class="attr">type</span>=<span class="string">"number"</span> <span class="attr">maxlength</span>=<span class="string">"10"</span> <span class="attr">bindinput</span>=<span class="string">"inputChange"</span> <span class="attr">class</span>=<span class="string">"input"</span> <span class="attr">placeholder</span>=<span class="string">"请输入您的求职意向"</span>&gt;</span><span class="tag">&lt;/<span class="name">input</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">view</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">view</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">view</span> <span class="attr">class</span>=<span class="string">"modal-footer"</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">view</span> <span class="attr">class</span>=<span class="string">"btn-cancel"</span> <span class="attr">bindtap</span>=<span class="string">"onCancel"</span> <span class="attr">data-status</span>=<span class="string">"cancel"</span>&gt;</span>取消<span class="tag">&lt;/<span class="name">view</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">view</span> <span class="attr">class</span>=<span class="string">"btn-confirm"</span> <span class="attr">bindtap</span>=<span class="string">"onConfirm"</span> <span class="attr">data-status</span>=<span class="string">"confirm"</span>&gt;</span>确定<span class="tag">&lt;/<span class="name">view</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">view</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">view</span>&gt;</span></span><br></pre></td></tr></table></figure>
<h1 id="样式代码"><a href="#样式代码" class="headerlink" title="样式代码"></a>样式代码</h1><p>index.wxss</p>
<figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/* 自定义弹窗样式 */</span></span><br><span class="line"><span class="selector-class">.modal-mask</span> &#123;</span><br><span class="line">  <span class="attribute">width</span>: <span class="number">100%</span>;</span><br><span class="line">  <span class="attribute">height</span>: <span class="number">100%</span>;</span><br><span class="line">  <span class="attribute">position</span>: fixed;</span><br><span class="line">  <span class="attribute">top</span>: <span class="number">0</span>;</span><br><span class="line">  <span class="attribute">left</span>: <span class="number">0</span>;</span><br><span class="line">  <span class="attribute">background</span>: <span class="number">#000</span>;</span><br><span class="line">  <span class="attribute">opacity</span>: <span class="number">0.5</span>;</span><br><span class="line">  <span class="attribute">overflow</span>: hidden;</span><br><span class="line">  <span class="attribute">z-index</span>: <span class="number">9000</span>;</span><br><span class="line">  <span class="attribute">color</span>: <span class="number">#fff</span>;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.modal-dialog</span> &#123;</span><br><span class="line">  <span class="attribute">width</span>: <span class="number">540</span>rpx;</span><br><span class="line">  <span class="attribute">overflow</span>: hidden;</span><br><span class="line">  <span class="attribute">position</span>: fixed;</span><br><span class="line">  <span class="attribute">top</span>: <span class="number">50%</span>;</span><br><span class="line">  <span class="attribute">left</span>: <span class="number">0</span>;</span><br><span class="line">  <span class="attribute">z-index</span>: <span class="number">9999</span>;</span><br><span class="line">  <span class="attribute">background</span>: <span class="number">#f9f9f9</span>;</span><br><span class="line">  <span class="attribute">margin</span>: -<span class="number">180</span>rpx <span class="number">105</span>rpx;</span><br><span class="line">  <span class="attribute">border-radius</span>: <span class="number">36</span>rpx;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.modal-title</span> &#123;</span><br><span class="line">  <span class="attribute">padding-top</span>: <span class="number">50</span>rpx;</span><br><span class="line">  <span class="attribute">font-size</span>: <span class="number">45</span>rpx;</span><br><span class="line">  <span class="attribute">color</span>: <span class="number">#030303</span>;</span><br><span class="line">  <span class="attribute">text-align</span>: center;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.modal-content</span> &#123;</span><br><span class="line">  <span class="attribute">padding</span>: <span class="number">50</span>rpx <span class="number">32</span>rpx;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.modal-input</span> &#123;</span><br><span class="line">  <span class="attribute">display</span>: flex;</span><br><span class="line">  <span class="attribute">background</span>: <span class="number">#fff</span>;</span><br><span class="line">  <span class="attribute">border</span>: <span class="number">2</span>rpx solid <span class="number">#ddd</span>;</span><br><span class="line">  <span class="attribute">border-radius</span>: <span class="number">4</span>rpx;</span><br><span class="line">  <span class="attribute">font-size</span>: <span class="number">35</span>rpx;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.input</span> &#123;</span><br><span class="line">  <span class="attribute">width</span>: <span class="number">100%</span>;</span><br><span class="line">  <span class="attribute">height</span>: <span class="number">82</span>rpx;</span><br><span class="line">  <span class="attribute">font-size</span>: <span class="number">35</span>rpx;</span><br><span class="line">  <span class="attribute">line-height</span>: <span class="number">35</span>rpx;</span><br><span class="line">  <span class="attribute">padding</span>: <span class="number">0</span> <span class="number">20</span>rpx;</span><br><span class="line">  <span class="attribute">box-sizing</span>: border-box;</span><br><span class="line">  <span class="attribute">color</span>: <span class="number">#333</span>;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="selector-tag">input-holder</span> &#123;</span><br><span class="line">  <span class="attribute">color</span>: <span class="number">#666</span>;</span><br><span class="line">  <span class="attribute">font-size</span>: <span class="number">35</span>rpx;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.modal-footer</span> &#123;</span><br><span class="line">  <span class="attribute">display</span>: flex;</span><br><span class="line">  <span class="attribute">flex-direction</span>: row;</span><br><span class="line">  <span class="attribute">height</span>: <span class="number">86</span>rpx;</span><br><span class="line">  <span class="attribute">border-top</span>: <span class="number">1px</span> solid <span class="number">#dedede</span>;</span><br><span class="line">  <span class="attribute">font-size</span>: <span class="number">40</span>rpx;</span><br><span class="line">  <span class="attribute">line-height</span>: <span class="number">86</span>rpx;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.btn-cancel</span> &#123;</span><br><span class="line">  <span class="attribute">width</span>: <span class="number">50%</span>;</span><br><span class="line">  <span class="attribute">color</span>: <span class="number">#666</span>;</span><br><span class="line">  <span class="attribute">text-align</span>: center;</span><br><span class="line">  <span class="attribute">border-right</span>: <span class="number">1px</span> solid <span class="number">#dedede</span>;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.btn-confirm</span> &#123;</span><br><span class="line">  <span class="attribute">width</span>: <span class="number">50%</span>;</span><br><span class="line">  <span class="attribute">color</span>: <span class="number">#ec0033</span>;</span><br><span class="line">  <span class="attribute">text-align</span>: center;</span><br><span class="line">&#125;</span><br><span class="line"><span class="comment">/* 自定义弹窗样式 */</span></span><br></pre></td></tr></table></figure>
<h1 id="逻辑代码"><a href="#逻辑代码" class="headerlink" title="逻辑代码"></a>逻辑代码</h1><p>index.js</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br></pre></td><td class="code"><pre><span class="line">Page(&#123;</span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 页面的初始数据</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    data: &#123;</span><br><span class="line">        showModal: <span class="literal">false</span>,</span><br><span class="line">        inputValue: <span class="literal">null</span></span><br><span class="line">    &#125;,</span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 弹窗</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    showDialogBtn: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">        <span class="keyword">this</span>.setData(&#123;</span><br><span class="line">            showModal: <span class="literal">true</span></span><br><span class="line">        &#125;)</span><br><span class="line">    &#125;,</span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 弹出框蒙层截断touchmove事件</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    preventTouchMove: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">        <span class="keyword">return</span></span><br><span class="line">    &#125;,</span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 隐藏模态对话框</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    hideModal: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">        <span class="keyword">this</span>.setData(&#123;</span><br><span class="line">            showModal: <span class="literal">false</span></span><br><span class="line">        &#125;);</span><br><span class="line">    &#125;,</span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 对话框取消按钮点击事件</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    onCancel: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">        <span class="keyword">this</span>.hideModal();</span><br><span class="line">    &#125;,</span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 对话框确认按钮点击事件</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    onConfirm: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">        <span class="keyword">this</span>.hideModal();</span><br><span class="line">    &#125;,</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 获取输入框中输入的值</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    inputChange:<span class="function"><span class="keyword">function</span>(<span class="params">option</span>)</span>&#123;</span><br><span class="line">        <span class="comment">/* 把文本框输入的内容方到 data 里面 */</span></span><br><span class="line">        <span class="keyword">this</span>.setData(&#123;</span><br><span class="line">            inputValue: option.detail.value</span><br><span class="line">        &#125;)</span><br><span class="line">    &#125;</span><br><span class="line">&#125;)</span><br></pre></td></tr></table></figure>
<h1 id="解读"><a href="#解读" class="headerlink" title="解读"></a>解读</h1><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">preventTouchMove: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<table><tr><td bgcolor="#FFFF00">结合界面代码（index.wxml）来看，蒙层 view 里有一个事件绑定 catchtouchmove=”preventTouchMove”。这样写的原因是阻断事件向下传递，避免在弹窗后还可以点击或者滑动蒙层下的界面。</td></tr></table>


      
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  <p><span>文章作者:</span><a href="/" title="访问 小东 的个人博客">小东</a></p>
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